The Response to Intervention KnowledgeBase is an online resource supporting educators in understanding and implementing the response to intervention (RtI) model. The KnowledgeBase is divided into the three stages of early implementation, identified by the National Implementation Research Network (NIRN). The first stage is Exploration, and it involves consideration of the essential components of RtI models and the district or school's readiness to implement an RtI model with fidelity. During the second stage, Installation, a district or school selects an RtI model and works actively to put in place all of the supports necessary for implementing the essential components. These supports can include staff member training, policies, implementation guides, forms, assessments, instructional programs, and software. The third stage is Initial Implementation, and it involves implementing the essential components. Initial Implementation can involve just a few components or teachers, and then implementation expands over time. When the majority of teachers are implementing all components of RtI with fidelity, the district or school is in the final stage, called Full Implementation. This KnowledgeBase is geared primarily toward those in the Exploration and Installation stages, with some resources for those in the Initial Implementation stage.

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